DE4116250A1 - Renovation of porcelain moulds for plastic or rubber tubing mfr. - by applying thermoplastic coating, after pyrolysis to remove impurities - Google Patents

Renovation of porcelain moulds for plastic or rubber tubing mfr. - by applying thermoplastic coating, after pyrolysis to remove impurities

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Publication number
DE4116250A1
DE4116250A1 DE4116250A DE4116250A DE4116250A1 DE 4116250 A1 DE4116250 A1 DE 4116250A1 DE 4116250 A DE4116250 A DE 4116250A DE 4116250 A DE4116250 A DE 4116250A DE 4116250 A1 DE4116250 A1 DE 4116250A1
Authority
DE
Germany
Prior art keywords
porcelain
moulds
plastic
mfr
pyrolysis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
DE4116250A
Other languages
German (de)
Other versions
DE4116250C2 (en
Inventor
Hansgeorg Ing Gruss
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Semperit AG Holding
Original Assignee
Semperit AG Holding
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to AT0266988A priority Critical patent/AT394041B/en
Application filed by Semperit AG Holding filed Critical Semperit AG Holding
Priority to DE4116250A priority patent/DE4116250C2/en
Publication of DE4116250A1 publication Critical patent/DE4116250A1/en
Application granted granted Critical
Publication of DE4116250C2 publication Critical patent/DE4116250C2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0218—Pretreatment, e.g. heating the substrate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
    • B28B11/04—Apparatus or processes for treating or working the shaped or preshaped articles for coating or applying engobing layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/34—Component parts, details or accessories; Auxiliary operations
    • B29C41/38—Moulds, cores or other substrates
    • B29C41/40—Cores
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
    • C04B41/48—Macromolecular compounds
    • C04B41/488—Other macromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5022—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with vitreous materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81—Coating or impregnation
    • C04B41/82—Coating or impregnation with organic materials
    • C04B41/83—Macromolecular compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
    • B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field
    • B05D1/06—Applying particulate materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/18—Processes for applying liquids or other fluent materials performed by dipping
    • B05D1/22—Processes for applying liquids or other fluent materials performed by dipping using fluidised-bed technique
    • B05D1/24—Applying particulate materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2203/00—Other substrates
    • B05D2203/30—Other inorganic substrates, e.g. ceramics, silicon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C41/14—Dipping a core
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2909/00—Use of inorganic materials not provided for in groups B29K2803/00 - B29K2807/00, as mould material
    • B29K2909/02—Ceramics
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00939—Uses not provided for elsewhere in C04B2111/00 for the fabrication of moulds or cores

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

Process is for the treatment of porcelain moulds for the mfr. of flexible tubular articles. This comprises coating the moulds, which are either new or are old, worn moulds, with a film of plastic after purification by pyrolysis. The porcelain mould is pref. immersed in a fluidised bed of thermoplastic powder at 300-500 deg.C. Alternatively, thermoplastic powder is sprayed on or applied electrostatically to the mould at 300-500 deg.C. Liq. plastic film, e.g., an epoxy resin or a polyurethane, is esp. applied to the mould by immersion or spraying, followed by curing. USE/ADVANTAGE - For the renovation of, and to extend the life of, porcelain moulds for the mfr. of flexible tubular items of latex, PVC, etc. The process adapts or renews the surface of the mould to suit the particular mfg. process.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung von Formen für Tauchartikel.The invention relates to a method for producing Molds for diving items.

Der Großteil der Formen für die Tauchartikel z. B. für Latex, PVC, usw.), wird aus Porzellan gefertigt. Die Ober­ fläche der neuen Porzellanformen muß den Anforderungen bei der Fertigung diverser Tauchartikel angepaßt sein. Diese kann für einige Tauchartikel zu rauh bzw. grobkörnig sein.The majority of the molds for the diving items e.g. B. for Latex, PVC, etc.) is made of porcelain. The waiter area of the new porcelain molds must meet the requirements be adapted to the manufacture of various diving articles. These may be too rough or grainy for some diving items.

Weiters werden die Tauchformen bei der Tauchartikelher­ stellung durch die erhöhten Temperaturen und verschiedenen Tauchbäder im Laufe der Zeit erodiert und müssen ausge­ tauscht werden. Die Lebensdauer der Prozellanformen, z. B. für die Herstellung von medizinischen Handschuhen, ist etwa 2 Jahre (bei 3-Schichten-Betrieb). Die Formen sind danach für das Tauchverfahren nicht mehr einsetzbar und müssen ent­ sorgt werden.Furthermore, the diving forms are from the diving article position due to the elevated temperatures and various Plunge pools eroded over time and need to be exhausted be exchanged. The lifespan of the process molds, e.g. B. for the manufacture of medical gloves, is about 2 years (with 3-shift operation). The shapes are for afterwards the immersion process can no longer be used and must be removed be worried.

Die Erfindung hat sich nun die Aufgabe gestellt die Ober­ fläche der Porzellan-Tauchformen dem jeweiligen Tauchver­ fahren anzupassen, bzw. zu erneuern.The invention has now taken on the task surface of the porcelain dipping forms drive to adapt or renew.

Gelöst wird die gestellte Aufgabe erfindungsgemäß dadurch, daß neue Porzellanformen, oder erodierte alte Porzellan­ formen, nach pyrolytischer Reinigung, mit einer geeigneten Kunststoffschicht überzogen werden.According to the invention, the object is achieved by that new porcelain shapes, or eroded old porcelain shape, after pyrolytic cleaning, with a suitable Plastic layer are coated.

Die Porzellanform wird auf 300 bis 500°C temperiert und in ein Wirbelbett, das aus einem Kunststoff in Pulverform besteht, eingetaucht.The porcelain mold is heated to 300 to 500 ° C and in a fluidized bed made from a plastic powder exists, immersed.

Weiteres ist nach diesem Verfahren auch eine Aufsprühung oder elektrostatische Aufbringung des pulverförmigen Kunst­ stoffes auf die temperierte Porzellanform möglich. Another is spraying on according to this process or electrostatic application of the powdered art possible on the tempered porcelain mold.  

Eine weitere Möglichkeit die neuen (rauhen) Prozellanformen zu adaptieren, bzw. die erodierten Formen zu erneuern ist diese, mit einem flüssigen Kunststoff, z. B. Epoxidharz, zu beschichten. Die Beschichtung kann durch Tauchen oder Auf­ sprühen auf die Form aufgetragen werden.Another possibility is the new (rough) process molds to adapt, or to replace the eroded forms this, with a liquid plastic, e.g. B. epoxy resin coat. The coating can be done by dipping or on spray can be applied to the mold.

Beispiel 1example 1

Die erodierte Porzellanform wird bei 500 bis 900°C pyrolytisch von organischen Verunreinigungen befreit. Die heiße Form wird aus dem Pyrolyseofen entnommen und bei Formtemperatur von 300 bis 500°C z. B. mit einer elektro­ statischen Pulverbeschichtungsanlage mit Nylon 13 (Polyamid) beschichtet. Das Nylon 13 (Polyamid) schmilzt und bildet auf der Formoberfläche einen homogenen Kunst­ stoffüberzug.The eroded porcelain mold is at 500 to 900 ° C pyrolytically freed from organic impurities. The hot form is removed from the pyrolysis furnace and at Mold temperature from 300 to 500 ° C z. B. with an electro static powder coating system with nylon 13 (Polyamide) coated. The nylon 13 (polyamide) melts and forms a homogeneous art on the surface of the mold fabric cover.

Beispiel 2Example 2

Die erodierte Porzellanform wird wie im Beispiel 1 pyrolytisch behandelt. Nachher wird diese bei Temperatur von 300 bis 500°C in ein Wirbelbett mit Nylon 11 (Polyamid) eingetaucht. Auf der Formoberfläche schmilzt das Nylon 11 und bildet einen homogenen sehr glatten Film. Die Form wird nach dem Auskühlen für jeweilige Tauchprozesse eingesetzt.The eroded porcelain shape becomes like in example 1 treated pyrolytically. Afterwards this is at temperature from 300 to 500 ° C in a fluidized bed with nylon 11 (polyamide) immersed. The nylon 11 melts on the mold surface and forms a homogeneous very smooth film. The shape will used after cooling for respective immersion processes.

Beispiel 3Example 3

Eine erodierte Porzellanform die vorher pyrolytisch ge­ reinigt wurde wird in ein flüssiges Epoxidharz getaucht. Hierbei kann z. B. ein Epoxidharz der Fa. Ciba (Bezeichnung GY250 und Härter HY830) verwendet werden.An eroded porcelain shape that was previously pyrolytic was cleaned is dipped in a liquid epoxy resin. Here, for. B. an epoxy resin from Ciba (name GY250 and hardener HY830) can be used.

Das Epoxidharz mit dem die Porzellanform beschichtet ist, wird dann anschließend bei 100°C/10 min ausgehärtet.The epoxy resin with which the porcelain mold is coated, is then cured at 100 ° C / 10 min.

Das Epoxidharz bildet auf der Formoberfläche einen homogenen Überzug. The epoxy resin forms one on the mold surface homogeneous coating.  

Beispiel 4Example 4

Auf eine neue rauhe Porzellanform wird eine Kunststoff­ schicht auf Polyurethanbasis mit einer Spritzpistole aufge­ sprüht. Als Polyurethan kann z. B. ein Infracol-System (z. B. D 1006 der Fa. Stoll) verwendet werden. Nach dem Aufsprühen des Polyurethans auf die Porzellanform wird anschließend in einem Infrarotofen das Polyurethan ausgehärtet. Dieser Überzug eignet sich für besonders hohe Tauchtemperaturen.A plastic is placed on a new rough porcelain mold layer based on polyurethane with a spray gun sprays. As polyurethane, for. B. an Infracol system (e.g. D 1006 from Stoll) can be used. After this Spraying the polyurethane on the porcelain mold then the polyurethane in an infrared oven hardened. This coating is suitable for particularly high ones Diving temperatures.

Dieses Verfahren ist nicht nur aüf die Kunststoffe be­ schränkt die in den Beispielen 1 bis 4 aufgezählt sind.This process is not only for plastics limits those listed in Examples 1 to 4.

Es würden auch erfolgreiche Versuche mit anderen Kunst­ stoffen, wie Polyäthylen, PVC, Polyester Vinylesterbasis, Polyvinilidenfluorid, usw. durchgeführt.There would also be successful attempts with other art substances, such as polyethylene, PVC, polyester vinyl ester base, Polyvinilidene fluoride, etc.

Infolge der glatten Kunststoffoberfläche bleiben die Tauch­ partikel auf der Form weniger haften. Spuren von Tauch­ partikeln lassen sich von der Form mit herkömmlichen Wasch­ mitteln beseitigen.Due to the smooth plastic surface, the diving remains particles stick less to the mold. Traces of diving Particles can be shaped using conventional washing eliminate means.

Claims (4)

1. Verfahren zur Behandlung von Porzellanformen zur Herstellung von Tauchartikeln, dadurch gekennzeichnet, daß neue Porzellan­ formen oder alte erodierte Porzellanformen nach pyrolytischer Reinigung mit einer Kunststoffschicht überzogen werden.1. A process for the treatment of porcelain molds for the manufacture of diving articles, characterized in that new porcelain molds or old eroded porcelain molds are coated with a plastic layer after pyrolytic cleaning. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Porzellanform bei einer Temperatur von 300 bis 500°C in ein Wirbelbett aus thermoplastischem Kunststoffpulvcr eingetaucht wird.2. The method according to claim 1, characterized in that the Porcelain mold at a temperature of 300 to 500 ° C in one Fluid bed made of thermoplastic powder immersed becomes. 3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß auf die Porzellanform bei 300 bis 500°C ein thermoplastischer Kunst­ stoff in Pulverform aufgesprüht oder elektrostatisch aufge­ bracht wird.3. The method according to claim 1, characterized in that on the Porcelain mold at 300 to 500 ° C a thermoplastic art sprayed on in powder form or electrostatically applied is brought. 4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß auf die Porzellanform eine flüssige Kunststoffschicht, wie Epoxidharz, Polyurethan im Tauchverfahren oder Spritzverfahren aufgetragen und anschließend ausgehärtet wird.4. The method according to claim 1, characterized in that on the Porcelain mold a liquid plastic layer, such as epoxy resin, Polyurethane applied by dipping or spraying and then cured.
DE4116250A 1988-10-31 1991-05-17 Process for the treatment of dipping forms and use of the process Expired - Fee Related DE4116250C2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT0266988A AT394041B (en) 1988-10-31 1988-10-31 Process for the treatment of porcelain patterns for producing articles by dipping
DE4116250A DE4116250C2 (en) 1988-10-31 1991-05-17 Process for the treatment of dipping forms and use of the process

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0266988A AT394041B (en) 1988-10-31 1988-10-31 Process for the treatment of porcelain patterns for producing articles by dipping
DE4116250A DE4116250C2 (en) 1988-10-31 1991-05-17 Process for the treatment of dipping forms and use of the process

Publications (2)

Publication Number Publication Date
DE4116250A1 true DE4116250A1 (en) 1992-11-19
DE4116250C2 DE4116250C2 (en) 1999-10-28

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ID=39535564

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Application Number Title Priority Date Filing Date
DE4116250A Expired - Fee Related DE4116250C2 (en) 1988-10-31 1991-05-17 Process for the treatment of dipping forms and use of the process

Country Status (2)

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AT (1) AT394041B (en)
DE (1) DE4116250C2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017105215A1 (en) * 2015-12-18 2017-06-22 Boey Weng Kee Richard Environmentally-friendly dipping molds with extended life and method of manufacturing thereof

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MY189746A (en) * 2016-04-29 2022-03-01 Top Glove Int Sdn Bhd Modified ceramic former for manufacturing a nitrile butadiene rubber (nbr) article having improved grip properties

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Publication number Priority date Publication date Assignee Title
US3687414A (en) * 1970-11-09 1972-08-29 Robert G Robbins Valve assembly
DE2206561A1 (en) * 1972-02-11 1973-08-23 Messer Griesheim Gmbh VALVE
US4230773A (en) * 1978-12-04 1980-10-28 International Business Machines Corporation Decreasing the porosity and surface roughness of ceramic substrates
DE3122138A1 (en) * 1981-06-04 1982-12-23 DECO-Glas, Peter Böttger KG, 5418 Selters "METHOD FOR IMPROVING THE SURFACE TEXTURE OF CERAMIC OBJECTS"
JPS5837385A (en) * 1981-08-28 1983-03-04 Kiyoto Harada Speed change valve switching mechanism
GB2140533A (en) * 1983-03-01 1984-11-28 Douglas Diepa Williams Precision valve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017105215A1 (en) * 2015-12-18 2017-06-22 Boey Weng Kee Richard Environmentally-friendly dipping molds with extended life and method of manufacturing thereof

Also Published As

Publication number Publication date
ATA266988A (en) 1991-07-15
AT394041B (en) 1992-01-27
DE4116250C2 (en) 1999-10-28

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